Revision 0:45f2ef9eadb6, committed 2013-01-04

Comitter:

innovodesign

Date:

Fri Jan 04 18:09:53 2013 +0000

Commit message:

Modified UDP socket wrapper for new network stack, allowing broadcast packets.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/udpBroadcastSocket.cpp	Fri Jan 04 18:09:53 2013 +0000
@@ -0,0 +1,43 @@
+/*
+ * UDPBroadcastSocket accept socket option flags parameter on bind or init
+ * usage 
+ *    mySocket.init(SO_BROADCAST); (not tested)
+ *   or mySocket.bind(port,SO_BROADCAST); {tested, ok)
+
+ * UDPBroadcastSocket accept socket option flags
+ * These option flags per-socket from lwip\core\include\lwip\sockets.h
+ */
+//#define  SO_DEBUG       0x0001 /* Unimplemented: turn on debugging info recording */
+//#define  SO_ACCEPTCONN  0x0002 /* socket has had listen() */
+//#define  SO_REUSEADDR   0x0004 /* Allow local address reuse */
+//#define  SO_KEEPALIVE   0x0008 /* keep connections alive */
+//#define  SO_DONTROUTE   0x0010 /* Unimplemented: just use interface addresses */
+//#define  SO_BROADCAST   0x0020 /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
+//#define  SO_USELOOPBACK 0x0040 /* Unimplemented: bypass hardware when possible */
+//#define  SO_LINGER      0x0080 /* linger on close if data present */
+//#define  SO_OOBINLINE   0x0100 /* Unimplemented: leave received OOB data in line */
+//#define  SO_REUSEPORT   0x0200 /* Unimplemented: allow local address & port reuse */
+
+#include "udpBroadcastSocket.h"
+#include "Socket/UDPSocket.h"
+
+#include <cstring>
+
+using std::memset;
+
+int UDPBroadcastSocket::init(int optionFlags) {
+    int option = 1;
+    if (init_socket(SOCK_DGRAM)<0)
+        return -1;
+    else
+        return lwip_setsockopt(_sock_fd,SOL_SOCKET,optionFlags,(char*)&option,sizeof(option));
+}
+
+int UDPBroadcastSocket::bind(int port,int optionFlags)
+{
+    int option = 1;
+    if (UDPSocket::bind(port)<0)
+        return -1;
+    else
+        return lwip_setsockopt(_sock_fd,SOL_SOCKET,optionFlags,(char*)&option,sizeof(option));
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/udpBroadcastSocket.h	Fri Jan 04 18:09:53 2013 +0000
@@ -0,0 +1,20 @@
+#ifndef UDPBROADCASTSOCKET_H
+#define UDPBROADCASTSOCKET_H
+
+#include "Socket/UDPSocket.h"
+#include <cstdint>
+
+/**
+UDP Broadcast Socket
+    // Allows one-to-many communication over ethernet
+    // Override an UDP Socket with additional flag
+    // when initing or binding a port use init(SO_BROADCAST) or bind(port,SO_BROADCAST) respectively.
+    // Note multicasting many be more suitable for some applications, but isn't support by this socket.
+*/
+class UDPBroadcastSocket : public UDPSocket {
+
+public:
+    int init(int optionFlags); 
+    int bind(int port,int optionFlags);
+};
+#endif
\ No newline at end of file